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Publications

PLEASE NOTE: The Publications System provided by the Manufacturing Systems Integration Division (MSID) has moved to: http://www.mel.nist.gov/msidlibrary/publications.html. The pages below are maintained for archival purposes only.

Publication summary

Author(s): Stanley Su, V. Krishnamurthy and H. Lam

Publication date: 1988

Citation: Stanley Su, V. Krishnamurthy and H. Lam: "An Object-oriented Semantic Association Model, AI in Industrial Engineering and Manufacturing: Theoretical Issues and Applications(OSAM*)," American Institute of Engineers, 1988.

Availability:

  • A paper copy of this document is available by contacting Kristy Thompson [web,email]
Abstract:
This paper presents an object-oriented semantic association model OSAM*, which possesses the concepts and features of the object-oriented paradigm. In addition to the concepts of object classes, objects, instance variables, methods, message passing, and inheritance found in existing object-oriented environments like SMALLTALK and OPAL, OSAM* allows a rule-based knowledge component to be integrated with objects and object classes. The expressive power of OSAM* lies in its capability to use various semantic association types and data constructors in a nested and/or recursive fashion to represent very complex objects and semantic relationships among objects found in many areas of applications such as CAD/CAM. The distinctions made by the various association types in this model allow the user of a knowledge base management system (KBMS) or a database management system (DBMS) to express explicitly the structural properties, operational characteristics and knowledge rules associated with the data. They also allow the KBMS or DBMS to operate more intelligently by using the semantic properties made known to the system. A semantically rich data model can greatly simplify the query language and, thus the user's tasks in manipulating a knowledge base, because the user's queries need not repeat the semantics already captured by the semantic model. In this paper, the association types of OSAM* are formally defined and illustrated using examples from CAD/CAM.

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